They are very good. Price is good as well!
I do not have a strong feeling for this grip either way. The good: It is soft, comfortable and does not slip. The less than good: It is a little thicker than I prefer especially before being used for awhile. Over all not a bad grip, just not my favorite. If you need to add a little thickness to your grip this would be a good choice.
I have used other overgrips but once I tried Gamma it was the best. The price in stores is double what I was able to get it for at Midwest.